Molecular Dynamics Simulation Study on Nanoelectromechanical Oscillator based on Graphene Nanoflake

摘要

Recently graphene has also been highlighted as an ideal lubricant for microelectromechanical systems(MEMSs)and nanoelectromechanical systems(NEMSs),where'traditional'lubricants no longer function normally.Atomic-scale graphene can be fabricated using micromechanical chop crack,thermal expansion,and extension growth techniques.Monolayer graphene is considered a suitable material for investigating two-dimensional quantization phenomena,such as temperature-trigger plasma,quantization absorption spectrum,and the fractional quantum Hall effect.Additionally,the hexagonal symmetric structure of graphene makes it a candidate material for nano devices.Here,we investigated the translational and rotational motions of a square graphene nanoflake with retracting motions by performing classical molecular dynamics simulations.Our results show that the kinetic energy of the translational motion was exchanged into the kinetic energy of the rotational motion.Thus,square graphene nanoflake oscillators have very low quality factors in translational motions.We discuss that square graphene nanoflakes have great potential to be a core component in nanoelectromechanical systems by detecting their motions with ultrahigh sensitivity to facilitate the development of sensor,memory,and quantum computing.